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Gem 9W0 Ciarka PITMAN COUPLING PATENTED DEC10|867 A INVENTOR Aitest fl wguitar tetra gaunt @ffir .v

GEORGE W. CLARK, OF MANCHE.STER, INDIANA. Letters Patent No. 71,853,dated December 10, 1867.

IMPROVEMENT IN PITMANfGOUPLING- TO WHOM IT MAY CONCERN:

- Be it known that I, GEORGE W. CLARK, of Manchester, Dearhorn county,Indiana, have invented a. new and useful Pitnian-Goupling; and I dohereby declare the following to be a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, making partof this specification.

My invention relates to 'aform 'ofjoint or coupling for pitinen whichenables them to beset up or adjusted sons to worknith the greatestaccuracy consistent with freedomof motion, and is especially designedfor the couplings of harvestcrpitmen with the crank and sickle-bar.

Figure 1 is a. longitudinal section of the preferred form of myinvention Figure 2 isahorizonta'l section-thereof.

Figure 3 is a longitudinal section of a modification of my invention.

Figure 4' is a horizontal section thereof.

A represents aportion of a harvester-pitman. B represents a portion ofthe sickle-bar, having a heel, C, traversed longitudinally by a hookedbolt, D, whose screw-threaded shank E is-provided with one or more nuts,F F: The pitman terminates in two prongs, G G, connected by a bolt, H,which bolt, being engaged in the hook D and in a notch, C, in theheelofthe sickle-bar, is firmly secured in said hook and notch by meansof the nuts F F. When it is desired to unship the sickle-bar it is onlynecessary to slacken thenuts F F, remove the bolt H, and draw the barout of the guides.

An inferior modification of my invention is seen at figs. 3 and 4, inwhich the hooked bolt is replaced by a clevis, I, which encloses theheel, a bolt, J, and lock-nut, K, taking the place of the nuts F F'.

I claim herein as new, and of my invention- The arrangement of forkedpitman A, G G, bolt H, screw-shanked hookD, and nuts F F, or theirequivalents, substantially as and for the purpose set forth.

In testimony of which invention, I hereunto set my hand.

GEO. W. CLARK.

Witnesses:

G120. H. KNIGHT, James H. LAYMAN.

